71 lines
2.0 KiB
Swift
71 lines
2.0 KiB
Swift
|
import Foundation
|
||
|
|
|
||
|
|
struct DeviceTime {
|
||
|
|
|
||
|
|
let date: Date
|
||
|
|
|
||
|
|
let secondsSincePowerOn: Int
|
||
|
|
|
||
|
|
let totalNumberOfMeasurements: Int
|
||
|
|
|
||
|
|
let secondsUntilNextMeasurement: Int
|
||
|
|
|
||
|
|
var nextMeasurement: Date {
|
||
|
|
date.adding(seconds: secondsUntilNextMeasurement)
|
||
|
|
}
|
||
|
|
|
||
|
|
var deviceStartTime: Date {
|
||
|
|
date.adding(seconds: -secondsSincePowerOn)
|
||
|
|
}
|
||
|
|
|
||
|
|
var estimatedMeasurementInterval: TimeInterval {
|
||
|
|
guard totalNumberOfMeasurements > 0 else {
|
||
|
|
return 60
|
||
|
|
}
|
||
|
|
return Double(secondsSincePowerOn + secondsUntilNextMeasurement) / Double(totalNumberOfMeasurements)
|
||
|
|
}
|
||
|
|
|
||
|
|
func measurementStartTime(measurementInterval interval: TimeInterval) -> Date {
|
||
|
|
nextMeasurement.addingTimeInterval(-Double(totalNumberOfMeasurements) * interval)
|
||
|
|
}
|
||
|
|
|
||
|
|
func measurementOffset(measurementInterval interval: TimeInterval) -> TimeInterval {
|
||
|
|
measurementStartTime(measurementInterval: interval).timeIntervalSince(deviceStartTime)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
extension DeviceTime: Equatable {
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
extension DeviceTime: Codable {
|
||
|
|
|
||
|
|
init(from decoder: Decoder) throws {
|
||
|
|
var container = try decoder.unkeyedContainer()
|
||
|
|
let time = try container.decode(Double.self)
|
||
|
|
self.date = .init(timeIntervalSince1970: time)
|
||
|
|
self.secondsSincePowerOn = try container.decode(Int.self)
|
||
|
|
self.totalNumberOfMeasurements = try container.decode(Int.self)
|
||
|
|
self.secondsUntilNextMeasurement = try container.decode(Int.self)
|
||
|
|
}
|
||
|
|
|
||
|
|
func encode(to encoder: Encoder) throws {
|
||
|
|
var container = encoder.unkeyedContainer()
|
||
|
|
try container.encode(date.timeIntervalSince1970)
|
||
|
|
try container.encode(secondsSincePowerOn)
|
||
|
|
try container.encode(totalNumberOfMeasurements)
|
||
|
|
try container.encode(secondsUntilNextMeasurement)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
extension DeviceTime {
|
||
|
|
|
||
|
|
static var mock: DeviceTime {
|
||
|
|
.init(
|
||
|
|
date: .now,
|
||
|
|
secondsSincePowerOn: 125,
|
||
|
|
totalNumberOfMeasurements: 3,
|
||
|
|
secondsUntilNextMeasurement: 55)
|
||
|
|
}
|
||
|
|
}
|